All you need to do is install a custom firmware like rogero 4.55. Then spoof it with a spoofer

3.55 CFW> 3.55 OFW> Regero 4.55 CEX> 4.60 Spoofer Try this

My suggestion to you would be to use rebug. You can get OFFICIAL updates from You must login or register to view this content. and only use it from them from a possible brick/code edit. Next I would suggest you being on 4.46.1 rebug you can use this You must login or register to view this content. if you go on DEX otherwise you might have to do research on how to get online while on CEX. I can ask a few people if I don't forget

Rebug is one of the many cfw's created for PS3 by the Rebug team, they create REX, and D-REX cfw's, CEX is Retail and DEX is Debug. with Rebug cfw however both REX and D-REX have the ability to swap between retail and debug options (switching to the debug settings on REX DOES NOT MEAN YOU ARE ON DEX). D-REX (which is considered to be DEX) can be used to RTM (Real Time Modding) with via target manager and debugger whereas REX cannot, however you can RTM using CCAPI (I believe 2.50 is the latest version) both have their positives and negatives, I cannot say which is better and which cfw or developer is better as everyone has their own preferences.

To save yourself from time and confusion, just stay on CEX.